tetee



(No Model.) 3 Sheets-Sheet l. W. L. TETER. STEAM GENBRATING APPARATUS.

No. 412,05l. Patented Ont. 1,1889.

NIP-TITRE.'-

@@SMTAWT.

(No Model.) 3 Sheets-Sheet 2.

W. L. TETBR. STEAM' GENERATING APPARATUS. No. 412,051. Patented Oct. 1, 1889.

N. FETEn Pholouwegnpher, wunngtm. D. C.

UNITED STAT-ns PATENT Brion.A

VILLIAM L. TETER, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-G EN ERATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 412,051, dated October 1, 1889.

Application filed Muy 29, 1889, Serial No. 312,663. (No model.)

To all whom t may concern.-

Be it known that I, WILLIAM L. TETER, of the city and county of Philadelphia and State of Pennsylvania, have invented an improvement in Steam Generating Apparatus, of which the following is a specification.

My invention has reference to steam-generating apparatus; and it consists of certain improvements, which are fully set forth in the following specification and shown in the accompanying drawings, which form a part thereof.

My invention has for its object the superheating of steam and the employment of suoli superheated steam, in conjunction with air, to supply the oxygen for the furnace. The employment of the steam enables a strong blast of air to be injected under the furnacegrate, the ashpit of which may be kept closed. The superheating of the steam performs the function of heating the air, and also brings the steam to sn'ch a condition that it is easilydeconiposed into its elements.

My invention consists in certain improvements in the construction of boiler-setting and attachments therefor, whereby the above functions may be carried out.

My object is to enable a greater volume of water to be evaporated with a given consumption of fuel than was heretofore thought possible. v

ln the drawings, Figure 1 is a perspective View of a steam generating apparatus embodying my invention, with a portion broken away to show the interior. Fig. 2 is a cross-y section of same on line t t of Fig. 8. Fig. 3 is a sectional elevation of the superheater, taken on line x of Fig. 4.. Fig. 4 is a sectional plan view of the superheater on line 'y fg of Fig. 8. Fig. 5 is a sectional elevation of the injector-mixers on line c s of Fig. 2. Fig. 6 is a side elevation of the apparatus as an entirety. Fig. 7 is a longitudinal section of same on line e' .z of Fig. 2. Fig. 8 is aside elevation with part in section, showing the forward portion of the apparatus; and Fig. 9 is a cross-section on line u u of Fig. 7, looking toward the front.

A is the boiler, preferably of the tubular type. i

B is the outer setting, preferably of brickwork.

C is the grate, and c is the iirebox in which the coal or fuel is received for considerable height above the grate. j

Vis the grate-door, and is arranged at a distance above the grate, so as to allow of the box c being formed and adapted toA receive considerable coal.

.W is a stoking-hole on a level with the grate, to enable the clinkers above the grate to be removed.

X is the ashpit door.

The doors V, XV, and X are preferably provided with a packing of asbestos or other non-combustible material b, (see Fig. 8,) to more perfectly exclude the air from the furj nace, except through the injector L.

D is the bridgewall at the rear of the furnace-grate, and E is the ash-pit.

F is a combustionchamber in the rear of the bridge-wall D, and toward its rear end is placed the superheater G, which is supported above the iioor by feet, so as to allow the ame to pass around it on all sides. terior of this superheater is formed with division-plates projecting from two opposite walls, and preferably from the top or cover G2 and the bottom or boX part, respectively, as shown in Fig. 3. By making these divisionplates of less length than the depth of the box there is formed a circuitous passage for the steam which is to flow through said superheater. (See arrows, Fig. 3.) By removing the cap or cover G2 the entire interior is exposed for cleaning or refilling with firebrick or other material, which is placed between the divisions, and through and around which the steam is caused to pass. By employing a heat-absorbing material within the superheatenbox the heat of the flames enveloping it will be absorbed and readily impart-ed to the steam which passes through the superheater before being mixed Ywith air and burned. ln place of nre-brick metal may be used. Steam is supplied to the superheater by a pipe l, having a valve i and connecting with the dome l-I of the boiler. The super heated steam flows from the superheater bya pipe K, and is led to the injector-mixer L, where it is mixed with air and the mixture delivered to the ash-pit E, or space under the grate. The steam. enters an upper compart ment M, and its supply to the lower compartd The in- ICO ments Ais controlled by needle or othervalves N, Working in connection with apertures m and operated by hand-screws Q. The force of the steam-blast may thus be regulated. The steam rushing through the orifices m and then through the tapering orifice O causes a current of air to pass in with it, which air maybe admitted and controlled by the valves P P, operated by handles p p. By this means the steam may be admixed with more or less air, as desired. The mixed air and steam pass down through the tube R, and is delivered tothe ash-pit through a perforated end o", as shown in Fig. 2. If desired, the entire end of tube R may be open. By this means I am enabled to use adeep bed of coal on the grate C, because the lower part of the coal is utilized to decompose the steam into hydrogen and oxygen, and subsequently the hydrogen and carbonio oxide formed are burned under the boiler, producing a large available quantity of heat units. To enable the proper regulation of temperature, I provide a sight-window S above the superheater, and so that the interior of the combustion-chamber may be surveyed.

The pipes I and K connect with the superheater G through a removable plate J, which makes repairs easy.

I do not confine myself to the exact details here shown, as they may be modified Without departing from the spirit of my invention,

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the boiler with the inclosed setting having the ash-pit, lire-box, and combustion-chamber, a grate between the ash-pit and tire-box, a superheater filled with a heat-absorbing material in the combustion-chamber, a steam-pipe for supplying steam to said superheater, a pipe for leading the superheated steam to the ash-pit, and airvalves to control the flow of air to the ashpit.

. 2. The combination of the boiler, with the inclosed setting having the ash-pit, fire-box, and combustion-chamber, a grate between the ash-pit and fire-box, a superheater lled with a heat-absorbing material in the combustionchamber, a steam-pipe for supplying steam to said superheater, a pipe for leading the superheated steam to the ash-pit, and airvalves to control the owof air to the ash-pit, a mixing-chamber in which the air and steam are mixed prior to entering the ash-pit, and a valve to control the tlow of the steam to the mixing-chamber.

3. The combination of the boiler, with the inclosed setting having the ash-pit, fire-box, and combustion-chamber, a grate between the ash-pit and fire-box, a superheater having ver-tical division-plates forming a circuitous passage-Way for the steam filled with a heatabsorbing material inthe combustion-chamsuperheater,a .pipe for leading the superheatedsteam to the ash-pit, and air-valves to control the ilow of air to the ash-pit.

4. The combination of a boiler, a boiler-setting having a fire-grate, an ash-pit, and a combustion-chamber, a superheater in said combustion-chamber, a steam-pipe leading from the boiler to the superheater, a steam injector-mixer, a steam-pipe from the superheater to the steam injector-mixer, valves on the injector to control the ilow of steam and air through the mixer, and a passage-way connecting the mixer with the ash-pit under the grate.

5. The combination of a boiler, a boiler-setting having a fire-grate, an ash-pit and combustion-chamber, a superheater in said combustion-chamber, a steam-pipe leading from the boiler to the superheater, a steam injectormixer consisting of the chamber M and tapering ports m O, and valves M and P, for controlling steam and air to the ports or oriices, a steam-pipe from the superheater to the steam in j enter-mixer, valves to control the flow ot' steam and air through the mixer, and a passage-way connecting the mixer with the ash-pit under the grate.

6. The combination of a boiler, aboiler-setting havin-g a fire-grate, an ash-pit, and a combustion-chamber, a superheater in said comA bustion-chamber, a steam-pipe leading from the boiler to the superheater, a steam-injector mixer, a steam-pipe from the superheater to the steam ing)- ector-mixer, valves, independent steam and air valves on the injector to control the flow of steam and air throughthe mixer,and a passage-Way connecting the mixer with the ash-pit under the grate, and a sightwindow above the superheater in the Wall of the boiler-setting.

'7. The combination of the boiler, the grate O, the ash-pit under the grate, the bridgewall D, the combustion-chamber F back `ot' the bridge-wall, a superheater made box shape and illed with fire-brick or other heating absorbing material and exposed on all sides, a steam-pipe for supplying steam to the superheater, a pipe for conveying the superheated steam from the superheater to the ashpit, a valve to control the liow of steam to the ash-pit, an air-passage leading to the ash-pit, and a valve to control the flow of air to the ash-pit.

8. The combination of the boiler, the grate C, the ash-pit under the grate, the bridge-Walls D, the combustion-chamber F back of the bridge-wall, a superheater made box shape and filled with {ire-brick or other heat-absorbing material and exposed on all sides, a steampipe for supplying steam to the superheater, a pipe for conveying the superheated steam from the superheater to the ash-pit, a valve to control the flow of steam to the ash-pit, an air-passage leading to the ash-pit, and a valve to control the ow of air to the ash-pit, a mixing-chamber for the steam and air` before IIO passing into the ash-pit, and a perforated wall through which the mixed air and steam is caused to pass in entering the ash-pit.

9. The combination of a boiler, a boilersetting having a re-box and ash-pit, a steam and air injector-mixer to introduce mixed steam and air to the ash-pit, having independent steam and air Valves, doors opening into the nre-box and ash-pit, andapaeking of nonro `,combustible material between said doors and boilenhsetting to exclude the passage of air through them and cause a forced draft to said ash-pit from said injector-mixer.

l0. The combination of a boiler having a 15 grate, ashpit, and combustion-chamber, with W. L. TETER.

Witnesses:

ERNEST HOWARD HUNTER, S. T. YERKES 

